Liquid-fuel-control apparatus



N. E. TYRRELL. LIQUID FUELCONTROL ARPAATUS. APPLICATION FILED SEPT. 29, 1919.

WITNESS? lfatented @ein il?, i922.

STATES NATI-IAN E. TYRRELL, OF KANSAS CITY, MISSOURI.

LIQUID-FUEL-CONTROL APPARATS.

Application filed September 29, 1919.

To all whom t may concern:

Be it known that l, NATHAN E. TYRRELL, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful improvements in Liquid- Fuel-Control Apparatus, of which the following is a specification.

This invention relates to liquid fuel c ontrol apparatus for furnaces and the like, and has for its primary object to produce inexpensive apparatus of the character indicated which can be easily and cheaply installed and which will operate efficiently and economically. Further objects are to provide for thermostatic control of the volume of fuel supplied to the burner for auto matic regulation and control of the temperature, and to provide a valve having selfcontained means whereby the size of the pilot light may be determined and regulated.

With these objects in view the invention consists in certain novel and useful features of construction and organization of parts as hereinafter described and claimed; and in order that it may be fully understood, reference is to be had to the accompanying drawing, in which: l

Figure 1, is an elevational view of a furnace equipped with apparatus embodying the invention.

'Figure 2, is an enlarged central vertical section of the automatic valve.

Figure 3, is a view showing the outer end of said valve, the fuel supply pipe therefor, and connections for the automatic operation of the valve.

Referring to the drawing in detail, 1 indicates a furnace of any suitable or preferred type,2a burner therein of any character, and 3 a pipe leading from a supply tank, not shown, to said burner, said supply tank being preferably elevated to insure flow of the fuel although the flow of the latter may be effected by a pressure tank or its equivalent. The pipe 3 is provided near the furnace with a hand valve 4L and at any suitable point accessible for observation purposes with a strainer S. It is also provided between the burner and the handvalve 4:, with an automatically controlled valve V.

The valve V is in the form of a coupling 5 into which is -tapped two sections of the pipe 3, and is provided with an angular sides of said lever.

Serial No. 327,191.

chamber or passage 6 connecting said sections and forming a part of the supply pipe.

At the point of communication with the section of the pipe leading directly to the 6() burner, the passage 6 is constricted or reduced in diameter as at 7, and the mouth of said reduced portion is flared as at 8. In line with the constricted portion of the passage but of greater diameter than the same and at the opposite side therefrom of passage 6, the valve 5 is provided with a threaded passage 9 for engagement by a threaded portionof a tubular valve stem 10, which stem is tapered externally at its front end. The bore or passage of the tubular valve stein is reduced in diameter at its front eX- treinity to produce a small jet orifice 11 and is tapered to provide a Haring mouth for. said jet orifice communicating with a cross passage l2 through which oil from, passage 6 may enter and escape through said orifice regardless of whether or not the valve stem 10 is closed 'against the seat 8 or not, so that in the event said stein is seated, suflicient fuel may continue to flow to provide for a pilot light.

Mounted upon the rear or outer end of the coupling 5 and upon the adjacent smooth portion of valve stem 10 is a stuliing boX 85 13 to guard against leakage of fuel from passage 6, and threaded upon the rear end of said stem to effect operation thereof and its consequent longitudinal adjustment, is a rock lever 111 and a pair of lock nuts 15 and 16, which nuts abut against opposite The lock nut 16 is provided with a threaded passage 17 in line with the bore of the tubular valve stein 10, and said passage 17 is 'engaged by the threaded portion of the needle valve 18 fitting in the bore of the valve stem and having its tapered end projecting across the passage 12 and into the flared mouth or orifice 11. In practice this needle valve is initially adjusted to provide a dependable pilot light by partial closure of the orifice, and thereafter requires no attention, it being noted that because the lever and nut 16 are located upon the valve stem, and the said nut upon the needle valve, rocking movements imparted to said lever eifect conjoint advance or rearward movement of said valve stem and needle valve and hence do not disturb the relative position of the same. Y

Connected to opposite ends of the rock arms 23 and 24 of a thermostatic apparatus 25 of any well-known or suitable type, which will respond to `fluctuations of temperature in the building containing the equipment in the customary manner.

The effect of a predetermined temperature is to cause the connection 2O to rock the` bar 111 and cut olf the flow of liquid fuel through pipe 3, the other connection 19, ac-

commodating this action, and the spring 21A functioning to hold the valve closed with a yielding pressure. When the temperature falls the operation of the connections is reversed to open the valve, the spring moving bodily with connection 2O as a part thereof.

As the operation of the various parts has been referred to in connection with the reference to the detail construction, no general recapitulation is thought to be necessary, and while I `have illustrated and described the preferred embodiment of the invention, it is obvious that it is susceptible of modifi cation within the spirit and scope of the appended claims.

I claim: v

1. In apparatus of the character described, the combination of a liquid fuel supply pipe, means controlling the flow of fuel therein, a thermostat, flexible connections between the thermostat and said means for transmitting power alternately through said flexible connections to cause said means to open or close said pipe to the flow of fuel,

pipe to the flow of fuel, to hold the said means in its closed position.

2. In apparatus of the character described, the combination of a liquid fuel supply pipe, means controlling the flow of fuel therein, a thermostat, flexible connections between the thermostat and said means for transmitting power alternately through said flexible connections to cause said means to open or close said pipe to the flow of fuel therein, and a spring tensioned by the flexible connection which transmits power to close said pipe to the flow of fuel, to hold the said means in its closed position; said spring relaxing its power on said means and moving bodily in relaxed condition under the power exerted to cause said means to open the said pipe to the flow of fuel.

3.1 In apparatus of the; character described., the combination of a liquid fuel supply pipe, an adjustable device controlling` said supply pipe, a rock lever foroperating said device, and a pair of flexible connections attached to said rock ylever. for operating the same and effecting opening and closing movements of the device; one of said connections including a retractile spring adapted to be tensioned when the device is closed, for exerting` yielding pressure to retain it in such position.

el. In apparatus of the character described, the combination of a liquid fuel supply pipe, an adjustable ,"screwjl device, controlling said supply pipe, a rock lever for operating said device and flexible connections connected to said rock lever for operating the same and effecting opening and closingv movements of the valve; one of said connections being elastic for exerting yielding pressure to close the device and retain it in such position, and thermostatic controlled means connected to said flexible con nections for alternately exerting a pulling force thereon.

In testimon)v whereof I afiix my signature.

NATHAN E. TYRRELL. 

